Animoto

Upload your photos, choose or upload music, add text, and an MTV-like video is created for you complete with cool transitions and editing.
"Most bang for your buck".Visit http://animoto.com/education to get an "all-access pass" for you and your students.

Create your own video slideshow at animoto.com.

Flixtime

http://flixtime.com/

Your Flix in a Flash"
Very similar to Animoto - Upload your photos, videos, choose or upload music, add text, and a video is created for you complete with cool transitions and editing.
Free to use for videos up to 60 seconds.

Slideshare

http://www.slideshare.net

Create quick and engaging slide shows with your images.
Upload your photos and then choose from a variety of options to create an engaging slideshow.
A large variety of styles, skins, themes, music, backgrounds and effects to choose from.
An account is needed to save your slide show for future edits and changes.
Use embed code to insert into your web page.